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Segment Results (Detail) - USD ($)
$ in Thousands

3 Months Ended

Mar. 31, 2017

Mar. 31, 2016

Dec. 31, 2016

Segment Reporting Information [Line Items]

Net interest income

$ 294,917

$ 327,866

Recoveries of loan losses

(4,008)

(176)

Non-interest income

^[1]

32,172

35,237

Non-interest expense

^[2]

166,943

158,448

Income before income taxes

164,154

204,831

Income tax expense (benefit)

60,197

74,922

Net income

103,957

129,909

Identifiable segment assets (period-end)

48,824,564

48,515,572

$ 48,926,555

Operating Segments

Segment Reporting Information [Line Items]

Non-interest income

32,172

35,237

Banking Operations

Segment Reporting Information [Line Items]

Net interest income

292,277

324,917

Recoveries of loan losses

(4,008)

(176)

Non-interest income

^[1]

21,869

30,586

Non-interest expense

^[2]

150,936

142,050

Income before income taxes

163,459

209,517

Income tax expense (benefit)

59,920

76,815

Net income

103,539

132,702

Identifiable segment assets (period-end)

48,285,443

47,739,937

Banking Operations | Inter-segment

Segment Reporting Information [Line Items]

Non-interest income

(3,759)

(4,112)

Banking Operations | Operating Segments

Segment Reporting Information [Line Items]

Non-interest income

18,110

26,474

Residential Mortgage Banking

Segment Reporting Information [Line Items]

Net interest income

2,640

2,949

Non-interest income

^[1]

10,303

4,651

Non-interest expense

^[2]

16,007

16,398

Income before income taxes

695

(4,686)

Income tax expense (benefit)

277

(1,893)

Net income

418

(2,793)

Identifiable segment assets (period-end)

539,121

775,635

Residential Mortgage Banking | Inter-segment

Segment Reporting Information [Line Items]

Non-interest income

3,759

4,112

Residential Mortgage Banking | Operating Segments

Segment Reporting Information [Line Items]

Non-interest income

$ 14,062

$ 8,763

[1]	Includes ancillary fee income.
[2]	Includes both direct and indirect expenses.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
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